1
I have a function that returns a file to download, when the file name has accented characters and a certain size, the downloaded file comes with the wrong name (in Chrome comes the name of my function and in Firefox comes the shuffled name),
public FileStreamResult _ObtemArquivo(long idArquivo)
{
DtoArquivo arquivo = null;
// ---------------------
// ... Obtém o "arquivo"
// ---------------------
FileStreamResult retorno = null;
if (arquivo != null)
{
var stream = new MemoryStream(arquivo.Bytes);
// Usando o nome do arquivo diretamente o erro ocorre em todos os Browsers.
retorno = File(stream, "binary", arquivo.Nome);
//retorno = File(stream, "binary", Uri.EscapeUriString(arquivo.Nome));
}
return retorno;
}
Using "Uri.Escapeuristring" the error does not occur in Chrome but in Firefox all files with accent in name comes wrong (showing the formatting in name, Ex: %C3%A1%C3%A1%20%20C3%A2C3%A2_abcdefghijlmnpqrstuvxzkwy_abcdefghijlmnopqrstuv).
I also tested with HttpUtility.UrlEncode and Uri.EscapeDataString and both did not work as desired on all browsers.
When the file name has accent but is a short name, for example,
áá âââ_abcdefghijlmnpqrstuvxzkwy.abc
no problem, the Content-Disposition generated in Response header is
Conten-Disposition: Attachment; filename="=? utf-8? B? w6HDoSAgw6LDol9hYmNkZWZnaGlqbG1ucHFyc3R1dnh6a3d5LmZwcg==?="
only when the name is larger, for example,
áá âââ_abcdefghijlmnpqrstuvxzkwy_abcdefghijlmnopqrstuvxzkwy.abc
the error is generated and the Conten-Disposition generated is
Conten-Disposition: Attachment; filename="=? utf-8? B? w6HDoSAgw6LDol9hYmNkZWZnaGlqbG1ucHFyc3R1dnh6a3d5X2FiY2Rl?= %0d%0a =?utf-8? B? Zmdoawpsbw5vchfyc3r1dnh6a3d5lmcg==?="
I believe the problem is caused because in the second Conten-Disposition has two ?utf-8?, but I still don’t understand why this is happening and how to solve this problem.
Any help to understand or circumvent this problem will be very welcome, Thanks in advance.